I use Iceweasel at the moment since I'm on a Debian system, but I have no problem changing browser to whatever would work on my system. So, feel free to answer my question for any browser, plugin module, or whatever.
I like large fonts because of eye problems (I always use a projector). At the same time, I think it is annoying when a page is too wide to fit so you have to scroll left and right. Wouldn't it be cool with a dynamic font size, like "as big as possible, but still not overflowing the width"?
If there is no such solution for any browser, I realize this is a lot to ask for. I'm not expecting anyone to paste five lines of code to solve the problem.